void ShowLineOfSight()
{
List<int> neighbours = tgs.CellGetNeighbours(tgs.cellLastClickedIndex, 10);
if (neighbours != null)
{
int group1 = tgs.CellGetGroup(1);
int group2 = tgs.CellGetGroup(2);
tgs.CellTestLineOfSight(tgs.cellHighlightedIndex, neighbours, group2);
tgs.CellFlash(neighbours, Color.red, 1f);
}
}